One-time binding

HTML

<script src="https://code.angularjs.org/1.3.0/angular.js"></script>
<div ng-app="app" ng-controller="MainCtrl">
    <button ng-click="clickMe()">Click Me</button>
    <p>One-time binding: boundData.ssnLast4{{ ::fruit }}</p>
    <p>Normal binding: {{ fruit }}</p>
</div>

JavaScript

angular.module("app", []) 
.controller("MainCtrl", function($scope){
    var counter = 0;
    var fruits= ['apple', 'lemon', 'meloon', 'pineapple', 'longan'];
    $scope.clickMe = function() {
        $scope.fruit = fruits[counter % fruits.length];
        counter++;
    }
});